SS-120-S-2 Equivalent & Substitute Parts

Part Overview

The SS-120-S-2 is a 20-position receptacle connector manufactured by Samtec Inc., designed for board-to-board applications with 0.100" (2.54mm) pitch through-hole mounting. This connector features gold-plated mating contacts and tin-plated posts, packaged in tube format. The product is active and ROHS3 compliant, making it suitable for modern electronic assemblies requiring reliable interconnection in standard pitch configurations.

Substitute parts may be required due to packaging availability, inventory constraints, or specific contact finish requirements for particular applications.

Key Parameters

Parameter	Value
Connector Type	Receptacle
Number of Positions	20
Pitch - Mating	0.100" (2.54mm)
Mounting Type	Through Hole
Contact Type	Female Socket
Contact Material	Beryllium Copper
Contact Finish - Mating	Gold
Termination	Solder
Operating Temperature	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the SS-120-S-2 is determined by the following critical parameters:

Primary Compatibility Criteria:

20-position configuration
0.100" (2.54mm) mating pitch
Through-hole solder termination
Female socket contact type
Beryllium copper contact material with gold mating finish
Operating temperature range -55°C ~ 125°C

Identified Substitute Categories:

Category 1: Direct Samtec Series Substitutes — Parts maintaining identical electrical and mechanical specifications with variations in packaging or contact finish thickness. SS-120-G-2 qualifies as a direct substitute, differing only in packaging format (bulk vs. tube) and contact finish specifications.

Category 2: Cross-Manufacturer Socket Alternatives — Parts from different manufacturers meeting core position, pitch, and termination requirements. The 310-91-120-41-001000 from Mill-Max Manufacturing Corp. functions as a SIP socket alternative, maintaining 20-position, 0.100" pitch, and through-hole solder termination compatibility, though with different housing material and contact post specifications.

Parameter Comparison

Parameter	SS-120-S-2	SS-120-G-2	310-91-120-41-001000
Manufacturer	Samtec Inc.	Samtec Inc.	Mill-Max Manufacturing Corp.
Number of Positions	20	20	20 (1 x 20)
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Connector Type	Receptacle	Receptacle	SIP Socket
Contact Type	Female Socket	Female Socket	Socket
Mounting Type	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder
Contact Material - Mating	Beryllium Copper	Beryllium Copper	Beryllium Copper
Contact Finish - Mating	Gold	Gold	Gold
Contact Finish Thickness - Mating	10.0µin (0.25µm)	30.0µin (0.76µm)	10.0µin (0.25µm)
Contact Length - Post	0.125" (3.18mm)	0.125" (3.18mm)	0.125" (3.18mm)
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Packaging	Tube	Bulk	Tube
Product Status	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant

Engineering Selection Recommendations

SS-120-G-2 (Samtec Inc.) — Recommended as the primary substitute for SS-120-S-2. Both parts maintain identical electrical and mechanical specifications within the SS series. The SS-120-G-2 differs only in packaging format (bulk vs. tube) and mating contact finish thickness (30.0µin vs. 10.0µin). Both are ROHS3 compliant and active products. Selection between these parts depends on packaging requirements and contact finish durability specifications for the application.

310-91-120-41-001000 (Mill-Max Manufacturing Corp.) — Qualifies as a functional substitute based on core electrical and mechanical compatibility: 20-position configuration, 0.100" pitch, through-hole solder termination, and identical operating temperature range. However, this part carries RoHS non-compliant status, which may restrict use in applications requiring regulatory compliance. The housing material differs (PCT polyester vs. PBT glass-filled), and contact post specifications vary. This substitute is suitable only for applications where RoHS compliance is not mandated.

Frequently Asked Questions (FAQ)

Q: Can SS-120-G-2 be used as a direct replacement for SS-120-S-2?

A: Yes. Both parts are Samtec SS series receptacles with identical 20-position, 0.100" pitch configurations and through-hole solder termination. The primary differences are packaging format and mating contact finish thickness. Electrical and mechanical compatibility is maintained.

Q: What is the significance of the contact finish thickness difference between SS-120-S-2 and SS-120-G-2?

A: SS-120-S-2 specifies 10.0µin (0.25µm) mating contact finish thickness, while SS-120-G-2 specifies 30.0µin (0.76µm). Both are gold finishes on beryllium copper. The thicker finish on SS-120-G-2 may provide extended contact durability in high-cycle mating applications.

Q: Is the 310-91-120-41-001000 suitable for RoHS-regulated applications?

A: No. The 310-91-120-41-001000 is RoHS non-compliant, making it unsuitable for applications requiring RoHS compliance. Use only in applications where RoHS certification is not required.

Q: What are the packaging differences between substitute options?

A: SS-120-S-2 is supplied in tube packaging, while SS-120-G-2 is supplied in bulk packaging. The 310-91-120-41-001000 is supplied in tube packaging. Packaging selection depends on assembly process requirements and inventory management practices.

Q: Are all substitute parts rated for the same operating temperature range?

A: Yes. SS-120-S-2, SS-120-G-2, and 310-91-120-41-001000 all operate across -55°C ~ 125°C, ensuring thermal compatibility across substitute options.

Q: What housing material differences exist between the SS-120-S-2 and 310-91-120-41-001000?

A: SS-120-S-2 uses polybutylene terephthalate (PBT) glass-filled insulation material, while 310-91-120-41-001000 uses polycyclohexylenedimethylene terephthalate (PCT) polyester. Both materials are suitable for through-hole applications within the specified temperature range.

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